1.25G SFP transceiver with DDM function. RTXM191-xxx (DDM) Features
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1 1.25G SFP transceiver with DDM function RTXM191-xxx (DDM) Features Up to 1.25Gbps data rate Duplex LC receptacle optical interface compliant Single +3.3V power supply DDM function implemented External calibration Hot-pluggable Receiver Loss of Signal Output AC coupling of PECL signals Serial ID module on MOD(0-2) International Class 1 laser safety certified Transmitter disable input Operating temperature range: -10 o C ~+70 o C module Operating temperature range: 0 o C ~+70 o C RoHS Compliance 1
2 Application Gigabit Ethernet Gigabit Fiber Channel Switch to switch interface Switched backplane applications Standards Compliant with SFP MSA (INF-8074i) Compliant with SFF-8472 v9.3 Compliant with IEEE802.3z Gigabit Ethernet Compliant with ITU-T G.695 Compliant with FC-PI v2.0 Absolute Maximum Ratings Parameter Symbol Unit Min Max Storage Temperature Range Ts o C Relative Humidity RH % 5 95 Power Supply Voltage Vcc V Recommended Operating Conditions Parameter Symbol Unit Min Typ Max Case Operating Temperature Range Tc o C Power Supply Voltage Vcc V Data rate Gb/s / Specifications(tested under recommended operating conditions,unless otherwise noted) Parameter Symbol Unit Min Typ Max Notes Electrical Characteristics Tx Section Supply Current Rx Section Icc ma Single Ended Data Input Swing mv Single Ended Data Output Swing mv TX_fault /LOS output (TTL) VOH Vcc V VOL TX_disable input (TTL) VOH Vcc V VOL Optical transmitter Characteristics 2
3 m 850nm VCSEL-LD km 1310nm FP-LD km 1310nm FP-LD km 1550nm DFB-LD Launch Optical Power Po dbm km 1310nm DFB-LD km 1550nm DFB-LD km km 1550nm DFB-LD km VCSEL LD FP-LD Center Wavelength Range λc nm DFB-LD DFB-LD λ-6.5 λ Extinction Ratio EX db VCSEL LD Spectral Width λ nm 4 FP-LD 1 DFB-LD Side Mode Suppression Ratio SMSR db 30 DFB-LD Contributed Total Jitter added at TP2 TJ UI Relative Intensity Noise RIN db/hz Eye Diagram Complies with IEEE802.3z eye masks when filtered Dispersion Penalty db 1 2 Optical Rise/Fall Time Trise/Tfall ps Optical receiver Characteristics m nm 15km 1550nm 40km Receiver Sensitivity S dbm nm 30km/40km 1550nm 80km km nm 120km km 0 550m Overload Input Optical Power Pin dbm -3 15km ~80km km LOS Optical Dessert S Optical Assert db km ~80km km LOS Hysteresis db
4 . The supply current includes SFP module s supply current and test board working current. Note2. The transmitter center wavelengths λ are: 1471, 1491, 1511, 1531, 1551, 1571, 1591, 1611nm Note3. TP refers to the compliance point specified in IEEE802.3z, section Note4. RIN is the laser noise, integrated over a specified bandwidth, measured relative to average optical power with 12dB return loss. For multimode application, the RIN is better than -117dB/Hz. Note5. Optical transition time is the time interval required for the rising or falling edge of an optical pulse to transition between the 20% and 80% amplitudes relative to the logical 1 and 0 levels Note6. Measured with a PRBS test EX=10dB, BER Note7. The LOS Hysteresis to minimize chatter on the output line. In principle, Hysteresis alone does not guarantee chatter-free operation Digital Diagnostic Memory Map 2 wire address X (A0) 2 wire address X (A2) Serial ID Defined by SPF MSA(96bytes) Vendor Specific (32bytes) Reserved in SFP MSA (128bytes) Alarm and Warning Thresholds (56 bytes) Cal Constants (40 bytes) Real-Time Diagnostic Interface (24 bytes) Vendor Specific (8bytes) Vendor Specific User (136 bytes) Writable EEPROM(120bytes) Vendor Specific(8bytes) EEPROM Serial ID Memory Contents Accessing Serial ID Memory uses the 2 wire address X (A0). Memory Contents of Serial ID are shown in Table 2. 4
5 Table 2 Serial ID Memory Contents Data Size Address (Bytes) Name of Field Contents(Hex) Description BASE ID FIELDS 0 1 Identifier 03 SFP 1 1 Ext. Identifier 04 SFP function is defined by serial ID only 2 1 Connector 07 LC Connector Transceiver Transceiver Codes 11 1 Encoding 03 NRZ 12 1 BR, Nominal 0C 1.25Gbit/s 13 1 Reserved Length (9μm) km 15 1 Length (9μm) 100m 16 1 Length (50μm) 10m Transceiver transmit distance 17 1 Length(62.5μm)10m 18 1 Length (Copper) 00 Not compliant 19 1 Reserved Vendor name WTD (ASCII) Reserved Vendor OUI Vendor PN Transceiver part number Vendor rev Wavelength Transceiver wavelength 62 1 Reserved CC_BASE Check Sum (Variable) Check code for Base ID Fields EXTENDED ID FIELDS Options 00 1A TX_DISABLE, TX_FAULT and Loss of Signal implemented BR,max BR,min Vendor SN Date code Diagnostic Monitoring Type Serial Number of transceiver (ASCII). For example B Manufactory date code. For example Digital diagnostic monitoring implemented, externally calibrated is implemented, RX 5
6 measurement type is Average Power Enhanced Options B0 Optional Alarm/Warning flags implemented for all monitored quantities, Optional Soft TX_FAULT monitoring implemented, Optional Soft RX_LOS monitoring implemented SFF_8472 Includes functionality described in Rev Compliance SFF CC_EXT Check Sum (Variable) Check sum for Extended ID Field. VENDOR SPECIFIC ID FIELDS Vendor Specific Read only Depends on customer information Reserved Read only Filled by zero Diagnostic Monitor Functions Diagnostic Monitor Functions interface uses the 2 wire address X (A2). Memory contents of Diagnostic Monitor Functions are shown in Table 3 Table 3 Memory contents of Diagnostic Monitor Function Field Data Size Address (bytes) Name Contents and Description Alarm and Warning Thresholds Temperature High Alarm Set to 85 O C Temperature Low Alarm Set to -5 O C Temperature High Warning Set to 75 O C Temperature Low Warning Set to 0 O C Vcc High Alarm Set to 3.6 V Vcc Low Alarm Set to 3.0 V Vcc High Warning Set to 3.5 V Vcc Low Warning Set to 3.1 V Bias High Alarm 2 IBias(25 o C) Bias Low Alarm 25% IBias(25 o C) Bias High Warning 2 IBias(25 o C ) Bias Low Warning 50% IBias(25 o C) TX Power High Alarm Manufacture measurement plus 2dB TX Power Low Alarm Manufacture measurement minus 2dB TX Power High Warning Manufacture measurement plus 1dB TX Power Low Warning Manufacture measurement minus 1dB RX Power High Alarm Maximum input optical power RX Power Low Alarm Minimum input optical power RX Power High Warning Maximum input power minus 3dB 6
7 RX Power Low Warning Manufacture measurement plus 3dB Reserved Calibration Constants RX Power Calibration Data4 RX Power Calibration Data3 RX Power Calibration Data2 RX Power Calibration Data1 RX Power Calibration Data0 Single precision floating-point numbers (various values at each device) Single precision floating-point numbers (various values at each device) Bias Calibration Data (fixed) Bias Calibration Data (fixed) TX Power Calibration Data1 TX Power Calibration Data0 Temperature Calibration Data1 Temperature Calibration Data (fixed) (fixed) (fixed) (fixed) Vcc Calibration Data (fixed) Vcc Calibration Data (fixed) Reserved (fixed) 95 1 Check Sum Checksum of bytes 0-94 Real Time Diagnostic Monitor Interface Measured Temperature Yield a 16-bit A/D value (see Table 3.1) Measured Vcc Yield a 16-bit A/D value (see Table 3.1) Measured Bias Yield a 16-bit A/D value (see Table 3.1) Measured TX Power Yield a 16-bit A/D value (see Table 3.1) Measured RX Power Yield a 16-bit A/D value (see Table 3.1) Reserved Logic Status See Table AD Conversion Updates See Table Alarm and Warning Flags See Table 3.3 Vendor Specific Vendor Specific Don t Access User writable EEPROM Vendor Specific Don t Access The measured values located at bytes (in the 2 wire address 0xA2) are raw A/D values (16-bit integers) of transceiver temperature, supply voltage, laser bias current, laser optical output power and received power. 7
8 All the measured values are Externally Calibrated, and then it is necessary to convert raw A/D values to real world units by the manner as shown in Table 3.1. Table 3.1 Real Time Diagnostic Monitor Values Byte Name Description Temperature 96 Internally measured transceiver temperature. Compliant with External Calibration of MSB SFF Temperature LSB 98 Vcc MSB 99 Vcc LSB Internally measured supply voltage. Compliant with External Calibration of SFF Laser Bias MSB Measured Laser bias current. Compliant with External Calibration of SFF Laser Bias LSB 102 Tx Power MSB Measured Tx power. Compliant with External Calibration of SFF Tx Power LSB 104 Rx Power MSB Measured Tx power. Compliant with External Calibration of SFF Rx Power LSB This transceiver implements two optional status bytes, Logic States at byte 110(0xA2) and A/D Updated at byte 111(0xA2) as shown in Table 3.2. A/D Updated status bits allow the user to verify if an update from the analog-digital conversion has occurred of the measured values, temperature, Vcc, laser bias, Tx power and Rx power. The user writes the byte to 0x00. Once a conversion is completed for a given value, its bit will change to 1 Table 3.2 Logic Status and AD Conversion Updates Byte Bit Name Description Tx Disable State Optional digital State of the Tx Disable input pin Soft Tx Disable Control Not supported (set to 0) Reserved Set to Rx Rate Select State Not supported (set to 1) Soft Rate Select Control Not supported (set to 0) Tx Fault Optional digital state of the Tx Fault output pin LOS Optional digital state of the LOS output pin Power on Logic Bit will be 0 when the analog monitoring is active Temp A/D Valid Indicates A/D value in Bytes 96/97 is valid Vcc A/D Valid Indicates A/D value in Bytes 98/99 is valid Laser Bias A/D Valid Indicates A/D value in Bytes 100/101 is valid Tx Power A/D Valid Indicates A/D value in Bytes 102/103 is valid Rx Power A/D Valid Indicates A/D value in Bytes 104/105 is valid Reserved Set to Reserved Set to Reserved Set to 0. Each of the measured values has a corresponding high alarm, low alarm, high warning and low warning threshold level at location 00-39(x0A2) written as the data format of a corresponding valued shown in Table 3.3.Alarm and warning flags at bytes (0xA2) are defined as follows. Alarm flags indicate conditions likely to result (or have resulted) in link failure and cause for immediate action. 8
9 Warning flags indicate conditions outside the guaranteed operating specification of transceiver but not necessarily causes of immediate link failures. Table 3.3 Alarm and Warning Flags Byte Bit(s) Name Description Temperature High Alarm Set when temperature monitor value exceeds high alarm level Temperature Low Alarm Set when temperature monitor value exceeds low alarm level Vcc High Alarm Set when Vcc monitor value exceeds high alarm level Vcc Low Alarm Set when Vcc monitor value exceeds Low alarm level Laser Bias High Alarm Set when laser bias monitor value exceeds high alarm level Laser Bias Low Alarm Set when laser bias monitor value exceeds low alarm level Tx Power High Alarm Set when Tx power monitor value exceeds high alarm level Tx Power Low Alarm Set when Tx power monitor value exceeds low alarm level Rx Power High Alarm Set when Rx power monitor value exceeds high alarm level Rx Power Low Alarm Set when Rx power monitor value exceeds low alarm level Reserved All bits set to Reserved All bits set to Reserved All bits set to Temperature High warning Set when temperature monitor value exceeds high warning level Temperature Low warning Set when temperature monitor value exceeds low warning level Vcc High warning Set when Vcc monitor value exceeds high warning level Vcc Low warning Set when Vcc monitor value exceeds Low warning level Laser Bias High warning Set when laser bias monitor value exceeds high warning level Laser Bias Low warning Set when laser bias monitor value exceeds low warning level Tx Power High warning Set when Tx power monitor value exceeds high warning level Tx Power Low warning Set when Tx power monitor value exceeds low warning level Rx Power High warning Set when Rx power monitor value exceeds high warning level Rx Power Low warning Set when Rx power monitor value exceeds low warning level Reserved All bits set to Reserved All bits set to Reserved All bits set to 0. Pin Description 9
10 20 VeeT 1 VeeT 19 TD- 2 Tx_Fault 18 TD+ 3 Tx_disable 17 VeeT 4 MOD-DEF(2) 16 VccT 5 MOD-DEF(1) 15 VccR 6 MOD-DEF(0) 14 VeeR 7 Rate Select 13 RD+ 8 LOS 12 RD- 9 VeeR 11 VeeR 10 VeeR Top of Board Bottom of Board As Viewed Through Top of Board Pin Name Function/Description Engagement order Notes 1 VeeT Transmitter Ground 1 2 TX Fault Transmitter Fault Indication TX Disable Transmitter Disable-Module disables on high or open MOD-DEF2 Module Definition 2-Two wire serial ID interface MOD-DEF1 Module Definition 1-Two wire serial ID interface MOD-DEF0 Module Definition 0-Two wire serial ID interface Rate Select Not Connected 3 8 LOS Loss of Signal VeeR Receiver Ground 1 10 VeeR Receiver Ground 1 11 Veer Receiver Ground 1 12 RD- Inverse Received Data out RD+ Received Data out VeeR Receiver Ground 1 15 VccR Receiver Power +3.3V±5% VccT Transmitter Power +3.3 V±5% VeeT Transmitter Ground 1 18 TD+ Transmitter Data In TD- Inverse Transmitter Data In VeeT Transmitter Ground 1. TX Fault is open collector/drain output which should be pulled up externally with a 4.7K 10KΩ resistor on the host board to supply VccT+0.3V or VccR+0.3V. When high, this output indicates a laser fault of some kind. Low indicates normal operation. In the low state, the output will be pulled to 0.8V. Note2. TX Disable input is used to shut down the laser output per the state table below. It is pulled up within the module with a K resistor. 10
11 Low (0 0.8V): Transmitter on Between (0.8V and 2V): Undefined High (2.0 VccT): Transmitter Disabled Open: Transmitter Disabled Note3. Mod-Def 0, 1, 2. These are the module definition pins. They should be pulled up with a K resistor on the host board to supply less than VccT+0.3V or VccR+0.3V. Mod-Def 0 is grounded by the module to indicate that the module is present. Mod-Def 1 is clock line of two wire serial interface for optional serial ID. Mod-Def 2 is data line of two wire serial interface for optional serial ID. Note4. LOS (Loss of signal) is an open collector/drain output which should be pulled up externally with a K resistor on the host board to supply VccT+0.3V or VccR+0.3V. When high, this output indicates the received optical power is below the worst case receiver sensitivity (as defined by the standard in use). Low indicates normal operation. In the low state, the output will be pulled to 0.8V. Note5. RD-/+: These are the differential receiver outputs. They are AC coupled 100Ω differential lines which should be terminated with 100Ω differential at the user SERDES. The AC coupling is done inside the module and thus not required on the host board. Note6. VccR and VccT are the receiver and transmitter power supplies. They are defined as 3.3V±5% at the SFP connector pin. The in-rush current will typically be no more than 30mA above steady state supply current after 500ns. Note7. TD-/+: These are the differential transmitter inputs. They are AC coupled differential lines with 100 Ω differential termination inside the module. The AC coupling is done inside the module and is thus not required on host board. Block Diagram 11
12 Required Host Board Components The MSA power supply noise rejection filter is required on the host PCB to meet data sheet performance. The MSA filter incorporates an inductor which should be rated 400mADC and 1Ωserial resistance or better. It should not be replaced with a ferrite. The required filter is illustrated in Figure 3. The MSA also specifies that 4.7K to 10KΩ pull-up resistors for TX_FAULT, LOS, and MOD_DEF0,1,2 are required on the host PCB. Figure is the suggested transceiver/host interface. Typical Application Circuit Laser Driver Receiver Amplifier 12
13 Package Outline PCB Layout Recommendation 13
14 Regulatory Compliance Feature Test Method Performance Electrostatic Discharge (ESD) to the Electrical Pins Electrostatic Discharge (ESD) Immunity Electromagnetic Interference (EMI) Immunity Safety MIL-STD-883E Method IEC CISPR22 ITE Class B FCC Class B CENELEC EN55022 VCCI Class 1 IEC Class 2 Class 1 (>1.5kV) Human Body Model Class 2 (>4.0kV) Compliant with standard Typically show no measurable effect from a 3 V/m field swept from 80 to 1000MHz applied to the transceiver without a chassis enclosure. FDA CDRH 21-CFR 1040 Class 1 UL E TUV-GS B CE E
15 Ordering Information Part. No RTXM SFP 1.25G Specifications Pack Rate Tx Pout Rx S Top Reach others 850nm VCSEL RTXM SFP 1.25G 1310nm FP -9.5 ~ -3dBm -9 ~ -3dBm RTXM SFP 1.25G 1310nm FP -5 ~ 0dBm RTXM SFP 1.25G RTXM SFP 1.25G RTXM SFP 1.25G RTXM SFP 1.25G RTXM SFP 1.25G RTXM SFP 1.25G RTXM SFP 1.25G RTXM SFP 1.25G RTXM SFP 1.25G RTXM SFP 1.25G RTXM SFP 1.25G RTXM SFP 1.25G RTXM SFP 1.25G RTXM SFP 1.25G RTXM SFP 1.25G RTXM SFP 1.25G 1310nm DFB 1550nm DFB 1550nm DFB 1550nm DFB 1471nm 1491nm 1511nm 1531nm 1551nm 1571nm 1591nm 1611nm 1471nm 1491nm 1511nm 1531nm -2 ~ -4 ~ +1dBm -2 ~ 0~ -18dBm -10~70o C 550m -20dBm -10~70o C 15km -23dBm -10~70o C 30km -23dBm -10~70 oc 40km -20dBm -10~70o C 40km -23dBm -10~70o C 80km -31dBm -10~70o C 120km -24dBm -24dBm -24dBm -24dBm -24dBm -24dBm -24dBm -24dBm -32dBm -32dBm -32dBm -32dBm 0~70 o C 80km 0~70 o C 80km 0~70 o C 80km 0~70 o C 80km 0~70 o C 80km 0~70 o C 80km 0~70 o C 80km 0~70 o C 80km 0~70 o C 120km 0~70 o C 120km 0~70 o C 120km 0~70 o C 120km Application 1000Base-SX 1000Base-LX 1000Base-LH 1000Base-LH1 1000Base-LH2 1000Base-ZX 1000Base-EX 15
16 RTXM SFP 1.25G 1551nm -32dBm 0~70 o C 120km RTXM SFP 1.25G 1571nm 0~ -32dBm 0~70 o C 120km RTXM SFP 1.25G 1591nm -32dBm 0~70 o C 120km RTXM SFP 1.25G 1611nm -32dBm 0~70 o C 120km : RoHS Compliance WTD reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information. Edition Published by Wuhan Telecommunication Devices Co.,Ltd. Copyright WTD All Rights Reserved. 16
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